Ionoplast Interlayer film is made of ethylene and methacrylate ion copolymer, containing about 1% metallic sodium ion. Five times stronger and up to 100 times stiffer than conventional laminating materials. With this kind of strength, the glass can be a more active structural element in the constructions, opening up design possibilities that didn’t exist before. Besides its strength, ionoplast interlayer retains excellent optical and visual performance even after years of outdoor exposure. It is much less vulnerable to moisture exposure or yellowing over time.